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Abstract
Abstract: A small ultramafic body which is a member of the Hayachine ultramafic complex crops out at Kagura, Kawai district, central Kitakami mountainland. This Kagura body consists of serpentinite, serpentinized pyroxene peridotite, pyroxenite, hornblende hornblende pyroxenite or pyroxene hornblendite, hornblendite, pyroxene hornblende gabbro, hornblende gabbro and hornblende gabbro pegmatite. And a little rodingitic rocks occur as wein like form within gabbroic rocks. The petrochemical features of the Kagura body and discussed by means of the chemical analyses of thirteen representative rocks. It is seemed that all the rock types are derived from and ultramafic magma in the order listed above and are formed by the succession of noted below: peridotite dunite pyroxene peridotite hornblendite (largely liquid) hornblende gabbro pyroxene hornblendite (liq.+cryst.) pyroxene hornblende gabbro hornblende gabbro pyroxenite. (largely crystalline) hornblende gabbro pegmatite Some opinion on the chemical character of the rodingitic rocks which are formed by hydrothermal reaction is give.
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